Evaluation of segregating populations from crosses between cultivated tomato and PI134418
Evaluation of segregating populations from crosses between cultivated tomato S. lycopersicum L. cv. maravilla and PI134418 wild accession of Solanum habrochaites var. glabratum with resistance to the fruit borer N. elegantalis was made. There was dominance of alleles that decrease the expression of the character mean fruit weight. The backcrossing method was more efficient than selfing in order to counteract the dominance of alleles that encode by small fruit size. The thrichomes and the mean number of fruit per bunch did not produce any effect on the fruit attack by the fruit borer; while that mean fruit weight had important effect on this attack, therefore, the insect tends to produce more damage with the increasing in the mean fruit weight. The RC1 and RC2 populations showed segregating typical behavior for evaluated characters, presenting high variability in all of them. The backcrossing method was effective to break the negative association between mean fruit weight and the resistance to the insect. The mean fruit weight in the RC2 recombinant was between 45.1 and 68.6 g and showed resistance to the fruit borer.
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Universidad Nacional de Colombia - Sede Palmira
2008
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oai:www.revistas.unal.edu.co:article-10402014-08-09T02:53:26Z Evaluation of segregating populations from crosses between cultivated tomato and PI134418 Evaluación de poblaciones segregantes producidas a partir de cruzamientos entre tomate cultivado y la accesión silvestre PI134418 de Solanum habrochaites var. glabratum resistente al pasador del fruto. Restrepo, Edwin Vallejo Cabrera, Franco Alirio Lobo, Mario Solanum lycopersicum Neoleucinodes elegantalis selfing thrichomes dominance. Solanum lycopersicum Neoleucinodes elegantalis autofecundación tricomas dominancia selfing thrichomes dominance Evaluation of segregating populations from crosses between cultivated tomato S. lycopersicum L. cv. maravilla and PI134418 wild accession of Solanum habrochaites var. glabratum with resistance to the fruit borer N. elegantalis was made. There was dominance of alleles that decrease the expression of the character mean fruit weight. The backcrossing method was more efficient than selfing in order to counteract the dominance of alleles that encode by small fruit size. The thrichomes and the mean number of fruit per bunch did not produce any effect on the fruit attack by the fruit borer; while that mean fruit weight had important effect on this attack, therefore, the insect tends to produce more damage with the increasing in the mean fruit weight. The RC1 and RC2 populations showed segregating typical behavior for evaluated characters, presenting high variability in all of them. The backcrossing method was effective to break the negative association between mean fruit weight and the resistance to the insect. The mean fruit weight in the RC2 recombinant was between 45.1 and 68.6 g and showed resistance to the fruit borer. Se realizó la evaluación de poblaciones segregantes producidas a partir de cruzamientos entre tomate S. lycopersicum L. cv. maravilla y la accesión silvestre PI134418 de S. habrochaites var. glabratum resistente al pasador del fruto N. elegantalis. Se encontró que hay dominancia de los alelos que disminuyen la expresión del caraacute;cter peso promedio de fruto. El método del retrocruzamiento resultó maacute;s eficiente que el de la autofecundación, para contrarrestar la dominancia de los alelos que codifican por el tamaño pequeño del fruto. Los tricomas y el número promedio de frutos por racimo no ejercieron ningún efecto sobre el ataque de los frutos por parte del pasador; mientras que el peso promedio de fruto sí tuvo efecto importante sobre dicho ataque, de tal manera que el insecto tiende a producir mayor daño a medida que se incrementa el peso promedio de fruto. Las poblaciones RC1 y RC2 se comportaron como las típicas segregantes para los caracteres evaluados y exhibieron amplia variabilidad en los mismos. El método del retrocruzamiento fue efectivo para romper la asociación negativa entre el peso promedio de fruto y la resistencia al insecto. El peso promedio de algunos de los frutos en los recombinantes RC2 fluctuó entre 45.1 y 68.6 g y mostraron resistencia al pasador. Universidad Nacional de Colombia - Sede Palmira 2008-01-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/msword application/pdf text/html https://revistas.unal.edu.co/index.php/acta_agronomica/article/view/1040 Acta Agronómica; Vol. 57 No. 1 (2008); 1-8 Acta Agronómica; Vol. 57 Núm. 1 (2008); 1-8 Acta Agronómica; v. 57 n. 1 (2008); 1-8 2323-0118 0120-2812 spa https://revistas.unal.edu.co/index.php/acta_agronomica/article/view/1040/1529 https://revistas.unal.edu.co/index.php/acta_agronomica/article/view/1040/1530 https://revistas.unal.edu.co/index.php/acta_agronomica/article/view/1040/1558 Derechos de autor 2008 Acta Agronómica https://creativecommons.org/licenses/by-nc-nd/4.0 |
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author |
Restrepo, Edwin Vallejo Cabrera, Franco Alirio Lobo, Mario |
spellingShingle |
Restrepo, Edwin Vallejo Cabrera, Franco Alirio Lobo, Mario Evaluation of segregating populations from crosses between cultivated tomato and PI134418 |
author_facet |
Restrepo, Edwin Vallejo Cabrera, Franco Alirio Lobo, Mario |
author_sort |
Restrepo, Edwin |
title |
Evaluation of segregating populations from crosses between cultivated tomato and PI134418 |
title_short |
Evaluation of segregating populations from crosses between cultivated tomato and PI134418 |
title_full |
Evaluation of segregating populations from crosses between cultivated tomato and PI134418 |
title_fullStr |
Evaluation of segregating populations from crosses between cultivated tomato and PI134418 |
title_full_unstemmed |
Evaluation of segregating populations from crosses between cultivated tomato and PI134418 |
title_sort |
evaluation of segregating populations from crosses between cultivated tomato and pi134418 |
description |
Evaluation of segregating populations from crosses between cultivated tomato S. lycopersicum L. cv. maravilla and PI134418 wild accession of Solanum habrochaites var. glabratum with resistance to the fruit borer N. elegantalis was made. There was dominance of alleles that decrease the expression of the character mean fruit weight. The backcrossing method was more efficient than selfing in order to counteract the dominance of alleles that encode by small fruit size. The thrichomes and the mean number of fruit per bunch did not produce any effect on the fruit attack by the fruit borer; while that mean fruit weight had important effect on this attack, therefore, the insect tends to produce more damage with the increasing in the mean fruit weight. The RC1 and RC2 populations showed segregating typical behavior for evaluated characters, presenting high variability in all of them. The backcrossing method was effective to break the negative association between mean fruit weight and the resistance to the insect. The mean fruit weight in the RC2 recombinant was between 45.1 and 68.6 g and showed resistance to the fruit borer. |
publisher |
Universidad Nacional de Colombia - Sede Palmira |
publishDate |
2008 |
url |
https://revistas.unal.edu.co/index.php/acta_agronomica/article/view/1040 |
work_keys_str_mv |
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